Mauricio Pochettino has provided a positive update on the fitness of Chelsea’s Levi Colwill. Chelsea and Aston Villa played out a 0-0 draw on Friday night in the FA Cup fourth round, which means they’ll need a replay next month at Villa Park. Unfortunately, Levi Colwill didn’t play last night despite being named in the starting line-up just one hour before kick-off. The 20-year-old defender was withdrawn from the XI during the warm up, replaced by Alfie Gilchrist. We’re concerned for Colwill’s fitness after his last minute withdrawal against Villa, but there’s good news that it’s nothing serio…